package com.itheima.reggie.controlller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.impl.ShoppingCartService;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Delete;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;
import java.util.List;

@RestController
@Slf4j
@RequestMapping("/shoppingCart")
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;


    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart) {
        log.info("shoppingCart:{}",shoppingCart);
        //设置用户id
        Long currentid= BaseContext.getCurrentId();
        //查询当前菜品或者套餐是否在购物车中
        shoppingCart.setUserId(currentid);
        //如果已经存在，则在原基础上+1
        Long dishId = shoppingCart.getDishId();

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<ShoppingCart>();
        queryWrapper.eq(ShoppingCart::getUserId,currentid);

        if (dishId != null) {
            //添加到购物车 为菜品
            queryWrapper.eq(ShoppingCart::getDishId,dishId);
        }else{
            //为套餐
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }
        //select *from shopping_cart where user_id = ? and dish_id=?/setmeal_id
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);

        if (cartServiceOne != null) {
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            shoppingCartService.updateById(cartServiceOne);
        }else{
            //如果不存在，则添加到购物车中 数量默认就是一
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne=shoppingCart;
        }
        return R.success(cartServiceOne);
    }
    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){
        log.info("查看购物车.......");
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);
        return R.success(list);
    }
    @DeleteMapping("/clean")
    public R<String> clean(){
        //SQL:delete from shopping_cart where user_id=?
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        shoppingCartService.remove(queryWrapper);
        return R.success("清空购物车成功");
    }
}
